Back to results
US 5,022,426 AGranted
Pressure operated sequencing valve
OwnerAndrew P. Fischerinventor
Life of this patent
Estimating the term…
Abstract
An improved sequencing valve comprising a housing having a desired number of inlet and outlet ports, a piston normally urged to an inoperative position and responsive to inlet pressure to pass fluid to an appropriate one of said outlet ports, together with camming means responsive to movement of said piston to rotate said piston in a positive step-wise fashion.
Claims10
A sequencing valve comprising:
- a generally cylindrical housing having at least one inlet port entering adjacent one end of said housing and having a plurality of outlet ports spaced evenly about the periphery of said housing adjacent the opposite end from said inlet port,
- a generally cylindrical piston located within said housing and slideable between a raised position and a lower position, said piston having an opening formed in the side wall thereof positioned to communicate with said outlet ports when said piston is in its raised position and having a wall closing said piston above said opening,
- sealing means carried by said piston to permit fluid from said opening to flow only to one adjacent outlet port,
- resilient means normally urging said piston to its lower position, and
- stepping means responsive to movement of said piston to its raised and lower positions to rotate said opening to advance to the next adjacent outlet port.
2 more elements
Dependencies are inferred from the claim text.